Intel Core i5-6400T vs Intel Core i5-6400 vs Intel Core i5-6600K

Intel Core i5-6400T

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The Intel Core i5-6400T is a frugal quad-core desktop processor based on the Skylake architecture, which was announced in August 2015. The CPU, which is manufactured in a 14 nm process, runs at 2.2-2.8 GHz and does not support Hyperthreading (only 4 threads simultaneously).

Architecture

Intel uses Skylake to replace both Broadwell as well as Haswell and therefore uses one core design for all TDP classes between 4.5-45 Watts. Several improvements of the Skylake architecture include bigger Out-to-Order-Buffer, optimizations for pre-fetching as well as bigger gains by Hyperthreading. However, the changes are small for a "Tock" – a new micro architecture – in general, so the per-MHz performance is only between 5-10 % (compared to Haswell) or less than 5 % higher (compared to Broadwell), respectively.

Performance

Depending on the utilization of Hyperthreading, the performance is roughly on par with the old Core i7-2670QM mobile processor (Sandy Bridge, 2.2-2.8 GHz, Hyperthreading), but sometimes also much higher.

Graphics

Graphics are handled by the integrated Intel HD Graphics 530 with 24 EUs (Execution Units), which is clocked at 350 - 950 MHz. Compared to the HD Graphics 4600 (Haswell, 20 EUs), the performance is increased by around 25 percent. The overall GPU performance is still low-end, so modern games can, if at all, only be played smoothly with low settings.

Power Consumption

Intel specifies the TDP with 35 Watts, so it can also be used in notebooks (although bigger ones).

Intel Core i5-6400

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Der Intel Core i7-6400T ist ein sparsamer Quad-Core Desktop-Prozessor auf Basis der Skylake-Architektur, der im August 2015 vorgestellt wurde. Die in einem 14-Nanometer-Prozess gefertigte CPU taktet mit 2,2 bis 2,8 GHz und bietet kein Hyper-Threading (daher nur 4 Threads parallel).

Architektur

Mit Skylake löst Intel sowohl Broadwell als auch Haswell ab und setzt damit in sämtlichen TDP-Klassen wieder auf ein einheitliches Kerndesign. Zu den diversen Verbesserungen der Skylake-Architektur gehören unter anderem vergrößerte Out-of-Order-Buffer, Optimierungen bei Prefetching und Sprungvorhersage sowie stärkere Zugewinne durch Hyper-Threading. Insgesamt fallen die Änderungen für einen "Tock", das heißt eine neue Mikroarchitektur, jedoch eher klein aus, sodass die Pro-MHz-Leistung nur um etwa 5 bis 10 Prozent (gegenüber Haswell) respektive unter 5 Prozent (gegenüber Broadwell) ansteigt.

Performance

Die Leistung ist je nach dem Nutzen von Hyperthreading in etwa auf dem Niveau eines alten Core i7-2670QM Mobilprozessors (Sandy Bridge, 2,2 - 2,8 GHz, Quad-Core, Hyperthreading) einzuordnen, bei Auslastung weniger Threads jedoch auch deutlich darüber. Ein Core i5-6300HQ für Notebooks rechnet dank seiner höheren Taktrate in etwa 10 Prozent schneller. Dennoch stehen auch für anspruchsvollere Anwendungen und (moderates) Multitasking ausreichende Leistungsreserven bereit.

Grafikeinheit

Für Grafikberechnungen zeigt sich die im Prozessor integrierte Intel HD Graphics 530 mit 24 EUs (Execution Units) verantwortlich, die mit 350 - 950 MHz taktet. Im Vergleich mit der HD Graphics 4600 (Haswell, 20 EUs) ist die Performance um etwa 25 Prozent gestiegen. Dennoch siedelt sich die GPU nur im absoluten Low-End-Bereich an, sodass aktuelle Spiele allenfalls in niedrigen Einstellungen flüssig dargestellt werden.

Leistungsaufnahme

Die TDP wird von Intel mit 35 Watt spezifiziert, wodurch die CPU auch in (größeren) Notebooks eingesetzt werden kann.

Intel Core i5-6600K

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The Intel Core i5-6600K is a high-end quad-core desktop processor based on the Skylake architecture, which was announced in August 2015. The CPU, which is manufactured in a 14 nm process, runs at 3.5 up to 3.9 GHz (2 cores: 3.8 GHz, 3 cores: 3.7 GHz, 4 cores: 3.6 GHz) and – contrary to the i7-series – does not support Hyperthreading. Being a so called "K"-model, the Core i5-6600K has a free multiplier and can be easily overclocked. 

Performance

Because of the slightly slower clocks, the smaller L3-cache (6 instead of 8 MB) as well as the missing Hyperthreading support, the Core i5-6600K is about 10-30 percent slower than the top model i7-6700K. The CPU will still handle demanding applications and games without any problems.

Graphics

Graphics are handled by the integrated Intel HD Graphics 530 with 24 EUs (Execution Units), which is clocked at 350 - 1150 MHz. Compared to the HD Graphics 4600 (Haswell, 20 EUs), the performance is increased by around 25 percent. The overall GPU performance is still low-end, so modern games can, if at all, only be played smoothly with low settings. 

Power Consumption

The TDP was slightly raised from 88 to 91 Watts compared to the predecessor.

Intel Core i5-6400TIntel Core i5-6400Intel Core i5-6600K
Intel Core i5 (Desktop)Intel Core i5 (Desktop)Intel Core i5 (Desktop)
SkylakeSkylakeSkylake
: Core i5 (Desktop) Skylake
Intel Core i5-6600K3500 - 3900 MHz4 / 46 MB
Intel Core i5-65003200 - 3600 MHz4 / 46 MB
Intel Core i5-6600T2700 - 3500 MHz4 / 46 MB
Intel Core i5-64002700 - 3300 MHz4 / 46 MB
Intel Core i5-6500T2500 - 3100 MHz4 / 46 MB
» Intel Core i5-6400T2200 - 2800 MHz4 / 46 MB
Intel Core i5-6600K3500 - 3900 MHz4 / 46 MB
Intel Core i5-65003200 - 3600 MHz4 / 46 MB
Intel Core i5-6600T2700 - 3500 MHz4 / 46 MB
» Intel Core i5-64002700 - 3300 MHz4 / 46 MB
Intel Core i5-6500T2500 - 3100 MHz4 / 46 MB
Intel Core i5-6400T2200 - 2800 MHz4 / 46 MB
» Intel Core i5-6600K3500 - 3900 MHz4 / 46 MB
Intel Core i5-65003200 - 3600 MHz4 / 46 MB
Intel Core i5-6600T2700 - 3500 MHz4 / 46 MB
Intel Core i5-64002700 - 3300 MHz4 / 46 MB
Intel Core i5-6500T2500 - 3100 MHz4 / 46 MB
Intel Core i5-6400T2200 - 2800 MHz4 / 46 MB
2200 - 2800 MHz2700 - 3300 MHz3500 - 3900 MHz
256 KB256 KB256 KB
1 MB1 MB1 MB
6 MB6 MB6 MB
4 / 44 / 44 / 4
35 65 91
14 14 14
FCLGA1151FCLGA1151FCLGA1151
DDR3(L)-1600/DDR4-2133 Memory Controller, AVX, AVX2, AES-NI, TSX-NI, Quick Sync, Virtualization, vProDDR3(L)-1600/DDR4-2133 Memory Controller, AVX, AVX2, AES-NI, TSX-NI, Quick Sync, Virtualization, vProDDR3(L)-1600/DDR4-2133 Memory Controller, AVX, AVX2, AES-NI, TSX-NI, Quick Sync, Virtualization, vPro save
iGPUIntel HD Graphics 530 (350 - 950 MHz)Intel HD Graphics 530 (350 - 950 MHz)Intel HD Graphics 530 (350 - 1150 MHz)
$192 U.S.$187 U.S.$242 U.S.
Intel Core i5 (Desktop) 6400TIntel Core i5 (Desktop) 6400Intel Core i5 (Desktop) 6600K

Cinebench R15 - CPU Multi 64Bit
420 Points (10%)
121%
6400 +
510 Points (12%)
min: 601     avg: 614.5     median: 601 (14%)     max: 654 Points
Cinebench R15 - CPU Single 64Bit
119 Points (55%)
113%
6400 +
134 Points (61%)
min: 161     avg: 165.5     median: 166 (76%)     max: 169 Points
Cinebench R11.5 - CPU Multi 64Bit
4.8 Points (11%)
125%
6400 +
5.9 Points (13%)
min: 6     avg: 7.1     median: 6 (14%)     max: 7 Points
Cinebench R11.5 - CPU Single 64Bit
1.4 Points (68%)
100%
6400 +
1.5 Points (76%)
min: 1     avg: 1.9     median: 1 (50%)     max: 2 Points
Cinebench R10 - Rendering Single 32Bit
4397 Points (45%)
116%
6400 +
5088 Points (52%)
6188 Points (64%)
Cinebench R10 - Rendering Multiple CPUs 32Bit
14798 Points (23%)
124%
6400 +
18297 Points (28%)
21324 Points (33%)
Cinebench R10 - Rendering Multiple CPUs 64Bit
18940 Points (25%)
29100 Points (38%)
Cinebench R10 - Rendering Single CPUs 64Bit
5740 Points (55%)
8370 Points (81%)
wPrime 2.0x - 1024m *
404.5 seconds (5%)
101%
6400 +
327.1 seconds (4%)
wPrime 2.0x - 32m *
12.9 seconds (3%)
100%
6400 +
10.5 seconds (2%)
WinRAR - Result
2770 KB/s (33%)
3643 KB/s (43%)
X264 HD Benchmark 4.0 - Pass 2
28.1 fps (1%)
118%
6400 +
33.9 fps (1%)
40.1 fps (1%)
X264 HD Benchmark 4.0 - Pass 1
139.2 fps (52%)
108%
6400 +
150.1 fps (56%)
196.3 fps (73%)
TrueCrypt - Serpent Mean 100MB
0.2 GB/s (12%)
0.3 GB/s (14%)
0.3 GB/s (16%)
TrueCrypt - Twofish Mean 100MB
0.4 GB/s (13%)
0.5 GB/s (15%)
0.5 GB/s (17%)
TrueCrypt - AES Mean 100MB
2.2 GB/s (11%)
100%
6400 +
2.7 GB/s (14%)
3.2 GB/s (16%)
3DMark 06 - CPU
5161 Points (35%)
7413 Points (50%)
Super Pi mod 1.5 XS 1M *
13 Seconds (3%)
100%
6400 +
12 Seconds (3%)
9.5 Seconds (2%)
Super Pi mod 1.5 XS 2M *
29 Seconds (1%)
100%
6400 +
27.6 Seconds (1%)
21.5 Seconds (1%)
Super Pi Mod 1.5 XS 32M *
681 Seconds (3%)
100%
6400 +
660.1 Seconds (3%)
501.1 Seconds (2%)
3DMark Vantage - P CPU no PhysX 1280x1024
21951 Points (31%)
3DMark 11 - Performance Physics 1280x720
5475 points (28%)
115%
6400 +
6283 points (32%)
7754 points (40%)
3DMark - Ice Storm Standard Physics 1280x720
42400 Points (27%)
113%
6400 +
48092 Points (31%)
61050 Points (39%)
3DMark - Ice Storm Extreme Physics 1920x1080
100%
6400 +
50839 Points (61%)
3DMark - Ice Storm Unlimited Physics 1280x720 offscreen
100%
6400 +
53239 Points (62%)
3DMark - Cloud Gate Standard Physics 1280x720
3887 Points (10%)
126%
6400 +
4894 Points (12%)
5562 Points (14%)
3DMark - Fire Strike Physics 1920x1080
5433 Points (17%)
127%
6400 +
6903 Points (21%)
7863 Points (24%)
Geekbench 3 - 32 Bit Multi-Core Score
8687 Points (11%)
12270 Points (15%)
Geekbench 3 - 32 Bit Single-Core Score
3000 Points (62%)
4080 Points (84%)
Geekbench 3 - 64 Bit Multi-Core Score
9133 Points (24%)
min: 12175     avg: 12544.5     median: 12544 (33%)     max: 12914 Points
Geekbench 3 - 64 Bit Single-Core Score
3131 Points (64%)
min: 4160     avg: 4214.5     median: 4214 (86%)     max: 4269 Points
Mozilla Kraken 1.1 - Total Score *
849.6 ms (1%)
Sunspider - 1.0 Total Score *
89.2 ms (1%)
100%
6400 +
82.9 ms (1%)
64.4 ms (1%)
Octane V2 - Total Score
43012 Points (82%)

Average Benchmarks Intel Core i5-6400T → 100%

Average Benchmarks Intel Core i5-6400 → 110%

Average Benchmarks Intel Core i5-6600K → 130%

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* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

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> Notebook / Laptop Reviews and News > Benchmarks / Tech > Processor Comparison - Head 2 Head
Redaktion, 2017-09- 8 (Update: 2017-09-11)